Instructions for reducing min front seat load when flying with
both seats occupied are in the manuals for the newer Duo X,
Arcus and through optional TN 295-29 for Janus.
Maybe it's also in the revision 9 for Duo FM, but the download
link on S-H website doesn't work. Ask S-H, and they will
probably solve it.
Regarding blaming EASA, I think it's actually the opposite,
german LBA had very restrictive view on complicated load
instructions, but EASA seems to accept this.
Also the ASK 21 has a corresponding TN nr 35, where the
reduction is allowed in the german and UK-flagged manual
pages, but not in the US-flagged. So maybe the FAA is to blame?

Bengt



At 07:55 04 June 2014, Jim White wrote:
At 00:52 04 June 2014, Karl Striedieck wrote:
Anyone know why the Duo (and supposedly other
Doppelsetzers) have the
same
minimum front seat weight with or without a person in the
back seat?

The rear seat moment arm has about 1/4th the effect
compared to the
front,
so I would think a 200 pounder in the rear would reduce the
front min
weight by 50 pounds - nicht wahr?

Maybe the numbers are based on a super cautious approach
for situations
like an instructor jumping out when the student solos and
forgetting to
recompute the cg?




My guess....The European High Command, EASA, has a strict
definition for
the format of the placard that MUST go in the cockpit. This has
a space for
only one configuration. If Shempp were to alter this it would
make the
aircraft unsafe to fly in Europe.

Jim